<div class="col-xs-12">
  <div class="field">
    <label><%= Spree.t('user_rule.choose_users') %></label><br>
    <input type='hidden' name='<%= param_prefix %>[user_ids_string]' class='user_picker fullwidth' value='<%= promotion_rule.user_ids.join(",") %>'>
  </div>
</div>
